Odpowiedź :
A
5y=2 / :5
x+y=2⅖
y=⅖
x+⅖=2⅖
y=⅖
x=2
B
y=0
x=-6
C
a=b
2a+b=9
2a+a=9
3a=9
a=3
D
u=4v
5u-v=10
5*4v-v=10
19v=10/:19
v=¹⁰/₁₉
u=4*¹⁰/₁₉
u=⁴⁰/₁₉
u=2 i2dziewietnaste
E
3r=s
3r+s=24
3r=s
3r+3r=24
6r=24 /:6
r=4
s=3*4
r=4
s=12
5y=2 / :5
x+y=2⅖
y=⅖
x+⅖=2⅖
y=⅖
x=2
B
y=0
x=-6
C
a=b
2a+b=9
2a+a=9
3a=9
a=3
D
u=4v
5u-v=10
5*4v-v=10
19v=10/:19
v=¹⁰/₁₉
u=4*¹⁰/₁₉
u=⁴⁰/₁₉
u=2 i2dziewietnaste
E
3r=s
3r+s=24
3r=s
3r+3r=24
6r=24 /:6
r=4
s=3*4
r=4
s=12
A)
(5y=2
(x+y=2 2/5
5y=2
x+y=12/5 |*(-5)
5y=2
-5x-5y=-12
-5x=-10
x=2
5y=2
y=0,4
B)
(4y-x=6
(17y=0
y=0
4y-x=6
0-x=6
x=-6
C)
(a=b |*(-2)
(2a+b=9
-2a=-2b
2a+b=9
-b=9
b=-9
2a+b=9
2a-9=9
2a=18
a=9
D)
(u=4v
(5u-v=10
u=4v
5*4v-v=10
u=4v
20v-v=10
19v=10
v=10/19
u=4v
u=4*10/19
u=40/19
E)
(3r=s
(3r+s=24|*(-)
3r=s
3r+3r=24
3r=s
6r=24 |:6
r=4
3r=s
12=s
(5y=2
(x+y=2 2/5
5y=2
x+y=12/5 |*(-5)
5y=2
-5x-5y=-12
-5x=-10
x=2
5y=2
y=0,4
B)
(4y-x=6
(17y=0
y=0
4y-x=6
0-x=6
x=-6
C)
(a=b |*(-2)
(2a+b=9
-2a=-2b
2a+b=9
-b=9
b=-9
2a+b=9
2a-9=9
2a=18
a=9
D)
(u=4v
(5u-v=10
u=4v
5*4v-v=10
u=4v
20v-v=10
19v=10
v=10/19
u=4v
u=4*10/19
u=40/19
E)
(3r=s
(3r+s=24|*(-)
3r=s
3r+3r=24
3r=s
6r=24 |:6
r=4
3r=s
12=s